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Ukrainian servicemen take part in military exercises near the eastern Ukrainian city of Schastya, in the Lugansk region on March 3, 2015. Western leaders called for a "strong reaction" from the international community if a major violation of a truce between pro-Russian separatists and Ukrainian forces in Ukraine occurs, the French presidency said after video conference talks. AFP PHOTO/ ANATOLII STEPANOVANATOLII STEPANOV/AFP/Getty Images